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25 //
26 //
27 // Author: Sebastien Incerti
28 // 30 October 2008
29 // on base of G4LowEnergyPolarizedRayleigh developed by R. Capra
30 //
31
32 #ifndef G4LivermorePolarizedRayleighModel_h
33 #define G4LivermorePolarizedRayleighModel_h 1
34
35 #include "G4VEmModel.hh"
36 #include "G4ParticleChangeForGamma.hh"
37 #include "G4PhysicsFreeVector.hh"
38 #include "G4ProductionCutsTable.hh"
39
40 class G4LivermorePolarizedRayleighModel : public G4VEmModel
41 {
42 public:
43
44 explicit G4LivermorePolarizedRayleighModel(
45 const G4ParticleDefinition* p = nullptr,
46 const G4String& nam = "LivermorePolarizedRayleigh");
47
48 virtual ~G4LivermorePolarizedRayleighModel();
49
50 void Initialise(const G4ParticleDefinition*, const G4DataVector&) override;
51 void InitialiseLocal(const G4ParticleDefinition*,
52 G4VEmModel* masterModel) override;
53 void InitialiseForElement(const G4ParticleDefinition*, G4int Z) override;
54
55 G4double ComputeCrossSectionPerAtom(
56 const G4ParticleDefinition*,
57 G4double kinEnergy,
58 G4double Z,
59 G4double A=0,
60 G4double cut=0,
61 G4double emax=DBL_MAX) override;
62
63 void SampleSecondaries(std::vector<G4DynamicParticle*>*,
64 const G4MaterialCutsCouple*,
65 const G4DynamicParticle*,
66 G4double tmin,
67 G4double maxEnergy) override;
68
69 G4LivermorePolarizedRayleighModel & operator=
70 (const G4LivermorePolarizedRayleighModel &right) = delete;
71 G4LivermorePolarizedRayleighModel(const G4LivermorePolarizedRayleighModel&) = delete;
72
73 private:
74 //cross sections
75 void ReadData(size_t Z, const char* path = nullptr);
76
77 // Polarization
78 // Generates \f$cos \left ( \theta\right )\f$ of the scattered photon
79 // incomingPhotonEnergy The energy of the incoming photon
80 // zAtom Atomic number
81 // \f$cos \left ( \theta\right )\f$
82 G4double GenerateCosTheta(G4double incomingPhotonEnergy, G4int zAtom) const;
83
84 // Generates \f$\phi\f$ of the scattered photon
85 // cosTheta \f$cos \left ( \theta\right )\f$ of the scattered photon
86 // \f$\phi\f$
87 G4double GeneratePhi(G4double cosTheta) const;
88
89 // Generates the polarization direction \f$\beta\f$ in the plane x, y relative to the x direction
90 // \f$\beta\f$
91 G4double GeneratePolarizationAngle(void) const;
92 G4ThreeVector GetPhotonPolarization(const G4DynamicParticle& photon);
93
94 G4ParticleChangeForGamma* fParticleChange;
95
96 const G4int maxZ = 100;
97 static G4PhysicsFreeVector* dataCS[101];
98 static G4PhysicsFreeVector* formFactorData[101];
99
100 G4double lowEnergyLimit;
101 G4int verboseLevel;
102 G4bool isInitialised;
103 };
104
105 #endif
106